ios - Swift-无论哪个ViewController启动，在应用启动时都显示showingSplashView

Question

在我的应用程序中，我使用的是revealingSplashView。

可以登录用户，以便更改起始ViewController:

    class MainNavigationControllerViewController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        if isLoggedIn() {
            let homeController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeVC")
            viewControllers = [homeController]
        }
    }

    fileprivate func isLoggedIn() -> Bool {
        return UserDefaults.standard.isLoggedIn()
    }
}

或用户尚未登录，因此从用户可以登录并进入FirstLaunchViewController的位置显示MainViewController。

目前，我以revealingSplashView形式呈现FirstLaunchViewController:

let revealingSplashView = RevealingSplashView(iconImage: UIImage(named: "zauberstab")!, iconInitialSize: CGSize(width: 120, height: 120), backgroundColor: .white)

revealingSplashView.startAnimation()

问题是，如果用户登录，我也希望拥有该动画，因此MainViewController是起始VC。我知道我可以将代码从FirstLaunchViewController复制到MainViewController，但这在用户登录并进入MainViewController时会导致出现问题，即使仅在应用启动后才显示动画。

Answer 1

就像@ chirag90一样，建议的解决方案是将AppDelegate中的代码移动到didFinishLaunchingWithOptions中，如下所示:

var window: UIWindow?

let revealingSplashView = RevealingSplashView(iconImage: UIImage(named: "zauberstab")!, iconInitialSize: CGSize(width: 120, height: 120), backgroundColor: .white)

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    revealingSplashView.startAnimation()
    window?.rootViewController?.view.addSubview(revealingSplashView)

    return true
}

出现的另一个问题是如何将reavelingSplashView添加为Subview，@ matt在此问题中回答了该问题:

adding Subview in AppDelegate